Now showing items 3191-3210 of 3226

    • Where Are the Magnetic White Dwarfs with Detached, Nondegenerate Companions? 

      Liebert, James W.; Wickramsinghe, Dayal T.; Schmidt, Gary D.; Silvestri, Nicole M.; Hawley, Suzanne L.; Szkody, Paula; Ferrario, Lilia; Webbink, Ronald F.; Oswalt, T. D.; Smith, Jonathan Allyn (2005-05)
      The Sloan Digital Sky Survey has already more than doubled the sample of white dwarfs with spectral classi- fications, the subset with detached M dwarf companions, and the subset of magnetic white dwarfs. In the course ...
    • Where is My Mind? The Who, What, and Where of Mind Wandering at Work 

      Belluccia, Anthony (2020-12)
      Mind wandering is a phenomenon often tackled by cognitive psychologists and overlooked by organizational psychologists, despite numbers suggesting that disengaged employees cost organizations $550 billion a year. Mind ...
    • White dwarf cosmochronometry. I. Monte Carlo simulations of proper-motion and magnitude-limited samples using Schmidt's 1/Vmax estimator 

      Wood, Matt A.; Oswalt, T. D. (1998-04-20)
      Observationally, white dwarf stars are a remarkably homogeneous class with a minimum observed Teff ∼ 4000 K. Theoretically, the physics that determines their cooling timescales is relatively more straightforward than that ...
    • White dwarfs in common proper motion binary systems: Mass distribution and kinematics 

      Silvestri, Nicole M.; Oswalt, T. D.; Wood, Matt A.; Smith, Jonathan Allyn; Reid, Iain Neill; Sión, Edward M. (2001-01)
      We present the mass distribution, gravitational redshifts, radial velocities, and space motions of white dwarf stars in common proper motion binary systems. The mass distribution we derive for the 41 DA white dwarfs in ...
    • White dwarfs in globular clusters: Hubble space telescope observations of M4 

      Richer, Harvey B.; Fahlman, Gregory G.; Ibata, Rodrigo A.; Pryor, Carlton; Bell, Roger A.; Bolte, Michael S.; Bond, Howard E.; Harris, William E.; Hesser, James E.; Wood, Matt A. (1997-08-01)
      Using WFPC2 on the Hubble Space Telescope, we have isolated a sample of 258 white dwarfs (WDs) in the Galactic globular cluster M4. Fields at three radial distances from the cluster center were observed, and sizable WD ...
    • The white dwarfs within 20 parsecs of the sun: Kinematics and statistics 

      Sión, Edward M.; Holberg, Jay B.; Oswalt, T. D.; McCook, George P.; Wasatonic, Richard P. (2009-12)
      We present the kinematical properties, distribution of spectroscopic subtypes, and stellar population subcomponents of the white dwarfs within 20 pc of the Sun. We find no convincing evidence of halo white dwarfs in the ...
    • The white dwarfs within 25 pc of the sun: Kinematics and spectroscopic subtypes 

      Sión, Edward M.; Holberg, Jay B.; Oswalt, Terry D.; McCook, George P.; Wasatonic, Richard P.; Myszka, Janine (2014-05-01)
      We present the fractional distribution of spectroscopic subtypes, range and distribution of surface temperatures, and kinematical properties of the white dwarfs (WDs) within 25 pc of the Sun. There is no convincing evidence ...
    • Who Emerges as a Leader? A Study on Cultural Values, Citizenship, and Trust 

      Scymcyk, Jacklyn Marie (2020-08)
      In this study peer and supervisor perceptions of emergent leaders were assessed in order to better understand and predict leader emergence. Using two moderated mediation models, organizational citizenship behaviors (OCB-I ...
    • Whole Earth Telescope discovery of a strongly distorted quadrupole pulsation in the largest amplitude rapidly oscillating Ap star 

      Holdsworth, Daniel L.; Kurtz, Donald W.; Saio, Hideyuki; Provençal, Judith L.; Letarte, Bruno; Sefako, Ramotholo R.; Petit, Véronique; Smalley, Barry; Thomsen, H.; Fletcher, C. L. (2018-01-01)
      We present a new analysis of the rapidly oscillating Ap (roAp) star, 2MASS J19400781 - 4420093 (J1940; V = 13.1). The star was discovered using SuperWASP broad-band photometry to have a frequency of 176.39 d-1 (2041.55 ...
    • Whole earth telescope observations of the helium interacting binary PG 1346+082 (CR Bootis) 

      Provençal, Judith L.; Winget, Don Earl; Nather, R. Edward; Robinson, Edward L.; Clemens, J. Christopher; Bradley, Paul A.; Claver, Charles F.; Kleinman, Scot J.; Grauer, Albert D.; Wood, Matt A. (1997-05-01)
      We present our analysis of 240 hr of white-light, high-speed photometry of the dwarf nova-like helium variable PG 1346+082 (CR Boo). We identify two frequencies in the low-state power spectrum, at 679.670 ± 0.004 μHz and ...
    • Whole earth telescope observations of the pulsating subdwarf B Star PG 0014+067 

      Vučković, Maja; Kawaler, Steven D.; O'Toole, Simon J.; Csubry, Zoltán; Baran, Andrzej S.; Zoła, Stanislaw; Moskalik, Paweł A.; Klumpe, Eric W.; Wood, Matt A.; Wilkat, V. (2006-08-01)
      PG 0014+067 is one of the most promising pulsating subdwarf B stars for seismic analysis, as it has a rich pulsation spectrum. The richness of its pulsations, however, poses a fundamental challenge to understanding the ...
    • Whole Earth telescope observations of the ZZ Ceti star HL Tau 76 

      Dolez, Noël; Vauclair, Gérard P.; Kleinman, Scot J.; Chevreton, M.; Fu, Jianning; Solheim, Jan Erik; Pérez, Jaime M González; Wood, Matt A.; Ahrens, Thomas J.; Silvestri, Nicole M. (2006-01)
      This paper analyses the Whole Earth Telescope observations of HL Tau 76, the first discovered pulsating DA white dwarf. The star was observed during two Whole Earth Telescope campaigns. It was a second priority target ...
    • Why simpler arguments are better 

      Mizrahi, Moti (2015-08-20)
      In this paper, I argue that, other things being equal, simpler arguments are better. In other words, I argue that, other things being equal, it is rational to prefer simpler arguments over less simple ones. I sketch three ...
    • Wide binary systems and the nature of high-velocity white dwarfs 

      Silvestri, Nicole M.; Oswalt, T. D.; Hawley, Suzanne L. (2002-08)
      We present measured radial velocities and complete space motions for 116 white dwarf stars with M dwarf companions. Thirteen pairs have " halo-like " velocities. According to a recent study by Oppenheimer et al., all these ...
    • Wind-Driven Setup, Roughness, and Drag over a Depth- and Fetch-Limited Coastal Estuary 

      Colvin, Jeffrey Allen (2018-12)
      The understanding of the momentum exchange across the air-sea interface is critical to accurately model and forecast wind speed, wave properties, setup, and circulation. This is particularly true for a restricted estuary, ...
    • Wing Tip Vortex Reduction 

      Seliquini, Sky; Azelis, Augustus; Al-Sulaiti, Mohammed; Kasyanju, Ambonisye; Lopez, Vanessa; Al Metwali, Mohammed; Vogel, Noah; Fry, John
      Winglets are used vastly in commercial jets. The main purpose of a winglet is to minimize the vortex effect forming at the tip of the wing in result to the transition between higher pressure and lower pressure. The main ...
    • Women's Health: The Impact of Child Abuse on Healthcare Utilization 

      Brandon, Brianna Mae (2020-02)
      Research has consistently shown the negative consequences associated with child abuse. Specifically, those with a history of child abuse are more likely to suffer from psychological disorders and physiological diseases ...
    • Work-Family Centrality Profile and Its Moderating Role on the Effects of Work-Family Conflict 

      Li, Anqi (2019-05)
      This dissertation employs latent profile analysis to explore potential work-family centrality profiles and its associated antecedents, distal outcomes, as well as its interaction effect with work-family conflict in shaping ...
    • Work-of-indentation as a means to characterize indenter geometry and load-displacement response of a material 

      Jha, Kaushal K.; Zhang, Shuo; Suksawang, Nakin; Wang, Ton-Lo; Agarwal, Arvind (2013-09-23)
      Normalized indentation works, referred to as the total and elastic energy constants, have been shown to be effective in the representation and analysis of experimental load-displacement data. However, their physical ...
    • Workplace Bullying: Proven Methodologies to Mitigate the Issue within the Government Contracting Workplace Environment 

      Kirk, Wendy Jan (2017-05)
      The purpose of this qualitative study is to ascertain proven methods to adopt within the workplace to mediate workplace bullying in organizations in a specific region of north Alabama, with emphasis given to organizations ...